Moving coil relay



K. C-. COX

MOVING COIL RELAY.

APPLICATION HLED SEPT. 17. m2.

1,427,09 Patented Aug. 29, 1922.

VVVVV Wizwsses V UNITED sT rssfPA-rsnr OFFICE.

KENWRICK CECIL COX, OE NORFOLK ISLAND, SOUTH PACIFIC.

MOVING COIL RELAY.

fp'ecifieai'iozi of Letters Patent.

Application filed. September 17, 1917. Serial newness. I

To all whom it may cancer-m" Be it known that I, KnNwRioK CECIL Cox, a subject of His Majesty the King of England, and resident oi Norfolk Island, South Pacific, have invented certain new and use- :tul Improvements in or Relating to Movna Coil Belays,'o:'r' which the following is aspecification.

his invention. relates to relaysof the sus pendedpmoving .eoiltype and has for its object ,tolprovide an improved relay of the. atoresaid type which 15 more especially intended for use with: a selenium or equiva lent magnifying; apparatus.

According to this invention therelay comprises asuspended moving coil and means 3 to prevent displacement (at the coil other than that ,due to signalling and adjustment.

' The suspended moving coil is adjusted by means of: pivoted spring; so as to control the tension on the coil, and the contacts are disposed on a pivoted block so that the said i The drawing is a perspective view of a their positions, such aSflS commonly used in I siphon recorders, but I prefer to use a head.

such asthat described in. the specification H of U. S. application 'Ser. No. 181%2 /1'r and which is therein used for suspending the coil of the galvanometer. The lower end of the coil 26 is attached by a thread, wire, or strip 28 to one end of spring 7 6 the other end of which is arranged topivot on a pin 77 or similar arrangement. The tension of the spring is adjusted by means of the milled screw 73 which presses down on the spring, or on the block 78 which may be conveniently arranged to hold the said spring. The moving tongue 31 is mounted as shown, on a strip 79 which is kept under tension, in the same manner as the wire on which recorder s phon is usually suspended, by. means of a spring 80, and screw 81 is pulled forward depending on the tensionput on the said wires 30 and the ten sion on the suspending wires 27. and strip 28. This pulling on the coil out of its proper: posstion may be very objectionable, and to prevent it I attach another thread or wire 82 to the centre of the clip 83 which. holds the top ot the coil 26 in order to hold the coil back against the tension of the. wires 30'. This additional thread. is conveniently led through. a hole in the hackofthe sus pension frame and secured to any suitable arrangement for adjusting its length. This adjustment maybe effected bymeans ofa screw, or by wrappingthe thread rounda small rod or roller, 84. the thread being wound more or less round the rod as turned inv a suitable holder. This thread is attached to the coil, as shewn, at a point on its axis o t n ovementso that the thread does not inter i" ere with the movement of the coil, and it is so placed on this axis of move ment as to exactly. counteract the tension of the wires 30 without in any way pulling the coil 26 out of its true positionasfixed by the suspending wires 27 and the strip 28. With the arrangement described the tension of the said. wiresso may be such as to pull. the'strip 7 9 considerably out of the straight line. There is no objection to this, and the arrangement ensures the tree and sharp ac- Patented Aug. 29, 1922."

tion of the coil 26 and tongue 31 which is necessary for satisfactory working;

Instead of making the part 85 on which the spring '1' 6 islmounted, solid with the sus pension frame as shewn, I ma position of the part 85 adju'stable with regard to the main par-tot the frame so as to provide a convenient means of adjusting the position of the lower end of the coil 26 it required.

make the In the working of the moving tongue 31 i of the relay B between its contacts 32, 33,-v

it is necessary to eliminate sparking at the points of contact. This is effected, for practical purposes by means of two small ee lden ers 87, 88, and. low resistance 89,

arranged as shewn in the drawing with respect to a second relayi apparatus C and batteries 39, 34. The relay as shown in the drawing may be applied to submarinecable apparatus in combination with a selenium cell apparatus and a second relay C, the reference numerals 90, 91, 92 in the figure indicating the terminals oi: the first relay; In this arrangement connection is made to the moving tongue 31 through the strip 79 and the iramework of the instrument. l ndericertain conditions, such as when the relay B is used ior'simple Morse working, one'only of the two contacts 92, or 33 may berequired, and in that case only one condenser" is necessary. For instai'u-e, ii the movement of the tongue 31. against one of its contacts '33.is utilized. to actuate any given apparatus, the corresponding condenser 8S onlyis required the resistance 89 may in such a case be inserted either as. shown between the condenser 89 and the tongue 31 or between the said condenser 89 and the said contact point Again, where both the contacts 32 and 33 are in use, I may use tworesistances, one between the condenser 87 and the contact point 39 and. the other between the other condeu v S8 and the other contact point 233, instead of the one resistance between the condenser and the tongue; or again, I may use, two such resistances in addition to the single resistance between the two condcnsersand the moving tongue.

The brass pieces 93, 9,4; whi h carry the contact screws 32, 33, are mounted as shown, on a block. 95 which is arranged o swii'ig round into a'position as indicated by the dotted lines in order to move 1 he contact points clear away from the tongue when required, A suitable stop screw 96 is arranged so that the block 95 is always brought back into correct position with regardto the tongue 31. The block 95 's mounted, asshewn, on aslide which is so arrangedthat the two contacts 32, 33, may

be adjustedequidistant from the moving tongue 31, or one or other of them nearer to the tongue, as required, by means of the stop and adjusting screw 96.

lVhat I claim is 1. In a relayliaving a movable coil, means fOrflexibly suspending said coil, a movable contacttongue connected with the movable coil, and means connected to the movable coil to prevent displacementthereof by the connections between the movable contact tongue and the movable coil.

In a relay having a movable coil and a movable contact tongue, means for adjustably and flexibly suspending said coil, taut means coni'iecting the movable contact tongue with the movable coil, and adjustable means connected with the movable coil to pre vent displacement thereoitby the conned tious between the movable coil and the movable contact tongue.

3. In a relay having a movable coil and a movable contact tongue, means for suseudin;;' said movable coil taut means, extending substantially at right angles to said siispcncliirq means, For connecting said coil and said contact tongue, and relatively taut adjustable means, extending substantially in the reverse direction to said first-mentioned taut niea connected to said coil. to prevent displacement thereoilfby the first-mentioned taut means.

4-. In a relay having a coil movable about a central axisand a movable contact tongue, means for suspeniilinp; said coil, taut means extending substantially at right angles to said axis, for connecting said coil and said contact tongue, and relatively taut adjustable means, extending: sul'istantially in the re 'erse directio ii to said lirstmcntioned taut means, connected to said'coil at a point on said axis to prevent displacement thereof by the first-mentioned ,taut means.

ii. in a relay having; a movable coil, means for su u 'iorting said coil, and means for vai vinc' the tensioi'i' of said supporting means, comprising an adjustable block pivoted at one endand a flexible member mount ed on s; l block and engaging said. supporting means.

6. In a relay havinga movable coiland a movable contact tongue connected therewith, a supporting base mounted beneath said tongue, and a pivoted block having stationary contacts normally in alinement with said contact tongue, mounted on said base and adapted to be swung to one side and thereby move the stationary contacts out of alineinent with. said contacttongue.

in testimony, hereoii" I have hereunto fied my. name.

KENIVRIUK .(JECIL COX. 

